5,7-Dihydroxy-3',4',5'-trimethoxyflavone

Also known as: Tricin 4'-methyl ether, Tricin methyl ether, 5,7-Dihydroxy-2-(3,4,5-trimethoxyphenyl)-4H-chromen-4-one, Tricetin 3',4',5'-trimethyl ether, 3',4',5'-O-trimethyltricetin, 3',4',5'-trimethyltricetin, NSC 123410

5,7-Dihydroxy-3',4',5'-trimethoxyflavone (CAS 18103-42-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C18H16O7 and a molecular weight of 344.31500 g/mol. Key properties include a melting point of 266-276ºC, a boiling point of 562.4ºC at 760mmHg, a density of 1.387g/cm3 and a flash point of 206.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 18103-42-9
Jingsj CID: J-46233-9
Molecular Formula: C₁₈H₁₆O₇
Molecular Weight: 344.31500 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	266-276ºC
Boiling Point	562.4ºC at 760mmHg
Density	1.387g/cm3
Flash Point	206.2ºC
Exact Mass	344.09000
PSA	98.36000
LogP	2.89700
Vapor Pressure	2.96E-13mmHg at 25°C
Refractive Index	1.627

Customs & Trade Information

HS Code	2914509090
Summary	HS:2914509090 other ketones with other oxygen function VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 5,7-Dihydroxy-3',4',5'-trimethoxyflavone?

The CAS number of 5,7-Dihydroxy-3',4',5'-trimethoxyflavone is 18103-42-9.

What are the molecular formula and molecular weight of 5,7-Dihydroxy-3',4',5'-trimethoxyflavone?

5,7-Dihydroxy-3',4',5'-trimethoxyflavone has molecular formula C18H16O7 and molecular weight 344.31500 g/mol.

What are the upstream and downstream products of 5,7-Dihydroxy-3',4',5'-trimethoxyflavone?

For 5,7-Dihydroxy-3',4',5'-trimethoxyflavone, Upstream Products: 2,4,6-Trihydroxyacetophenone, 3,4,5-Trimethoxybenzoyl chloride, Ethyl 3,4,5-trimethoxybenzoylacetate; Downstream Products: 5,7,3',4',5'-Pentamethoxyflavone, Tricin.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "5,7-Dihydroxy-3',4',5'-trimethoxyflavone (CAS 18103-42-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-46233-9 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.